Hurricane Agnes

The double swing and a miss.

12z NAM has this in its last frame (just coming into range).

And Mt. Holly mentioned the LE streamers -

Someone in "SE Nazareth" reported 0.60". Those streamers probably operate like plumes of smoke where there will be breaks in the flow dependent on the strength of the wind and then when the wind shifts direction slightly, obviously the streamer shifts with it. It always cracks me up when some of those streamers manage to make it all the way down here to Philly, sometimes creating a brief flizzard. I'll look on the radar at amazement that it made it all the way diagonally across the state like that. Edit to add KCCX's view of it.

Yeah - there is apparently a broad lake-effect batch of precip in the middle of the state too. The below is the streamer that has been sitting over you!

Here is what the Euro did between the 0z and 6z (for the same time frame using the 6z's last frame) -

Bottomed out at 30 just after 1:30 this morning and have been slowly on the upswing, where it is currently partly cloudy and 33 with dp 22.

Models all over the map wrt to what is going on over the MW. The Canadian seems to be similar to the GFS except it forms the low off the coast of the Carolinas and then sends it OTS (but brushes the southern part of up here).

0z Euro wants to make it a Miller A up the coast and the 6z GFS kicks it OTS.

Here's an interesting stat that NWS State College had tweeted (retweeted by Mt. Holly) - high of 51 at KPHL just after 3 am this morning - And they had the plot of data going back to the airport's operational data from January 1941 to date. I know we have these types of warmups like this in winter ahead of a cold blast but I guess the timing of this one was highly unusual. Also Mt. Holly extended the Wind Advisory to 1 am as apparently D.C. has been getting gusts down that way as the storm pulls away and a high to the SW builds in, with that gradient apparently shifting this way. Currently on and off snow showers and I actually have a dusting on some of the colder surfaces (grass and some car tops) and 35 with dp 26.

Plus I think the all-time low in the city (Philly) is -11F in 1934. I blame you guys for me doing this... Edit to add that the Euro would get close to the GFS IF those listed temps were (accidentally) generated/reported in C vs F.

I kept my humidifiers on overnight (LR/DR/BR) but have them set to cycle on/off to aim them for getting it to a certain (approximate) % humidity in the rooms they are in and they did cycle on and off, although even with the rain, it still never got higher than 44% in here with the forced air heat and an average room temp of 70. The dewpoint (which is a temperature to reach saturation) is going to depend on the air temp and it won't go higher than your ambient high temperature (whatever your room temp is). I would agree with Kamu that it could have been a leak since the water was only on the floor and I too have mine sitting on trays (including my bigger 3 gallon one on wheels that sits on a long boot tray thing on the floor). Still overcast with temp 35 dp 28. Luckily it looks like surfaces did dry with the breezes.

That should freeze into a glacier as a nice base! Looks like my precip has ended for the moment and I'm still holding at 0.93" for today + 0.61 from yesterday (total 1.54"). Currently overcast and 35 with dp 30.

12z GFS makes that look like some kind of overrunning precip from a southern slider with a cold front behind it. It seems to be showing it like 12 hours faster than the NAM. Then the 23rd storm looks juicer but is depicted as another slider (although it could come north) and then the 25th looks like a clipper or even a Miller-B type setup. The 6z ECM shows a similar overrunning for the 20th with cold behind it. Definitely going to be active the next week though!

Hot off the press updated PNS - Looks like a thick wrap-around band may end up pivoting over the area as the storm continues to move up to the NE and away from the area. Currently getting a light snow/rain mix and temp is 34 with dp 33.

Now getting SN- (albeit wet, since the temp is still above freezing at 34). No stickage. The sky seems to be trying to brighten too.

Getting a light snow/rain mix (the flakes are smaller than earlier, when they were near pancake size mixing with the rain). It is still contributing though so am up to 0.93" for the day (1.54" total). The back edge of the precip moving in from the SW is near but will see what happens with any wrap-around bands as the storm continues to push NE and pivots those bands around this way.

Mt. Holly (and adjacent WFOs) current Wind Advisories (including Coastal) -

Temp has dropped to 34 and more returns over me that are producing some wet snow. Got another 0.01" of liquid for 0.92" today/1.53" total 2-days.

As of post time, I am up to 0.91" of rain for today (so another 0.05") for a total of 1.52" for the 2 days so far. Temp is now down to 35, a 12 degree drop over about a 4 hour period. Have had cold returns over me and It's possible that it was a mix of snow/rain but looking out, it has been a cold rain for the most part.

This thing is like the storm-that-shall-not-be-named size! All kinds of hazards in effect including a Wind Advisory that was extended north and west of the earlier advisories.

Currently 41 with dp 39 this morning, and 0.61" of rain/snow melt recorded for Sunday and another 0.85" overnight today, for a total of 1.46" for the event so far. Believe it or not, my "high" surged to 47 just after 3:30 this morning and is now on the way down again. And yup the snow is gone. The low appears to be sitting over the Chesapeake Bay.

Sterling just put up a SVR for the Annapolis area so there is definitely some convection going on with that line. Not sure if we will get any of it but this is definitely a dynamic storm. Now up to 39 with dp 38 and moderate rain. 0.20". Will probably be heading to bed shortly...

Yeah - the right front quadrant of the low. It'll be dependent on the eventual position of it as it moves north. ETA now up to 38 with 0.10" in the bucket.

And continuing the non-diurnal temp rise, am at 37 with light to moderate rain. Bucket finally tipped and is reading 0.03".